Score-Based Tests With Fixed Effects Person Parameters in Item Response Theory: Detecting Model Misspecification Including Differential Item Functioning
Applied Psychological Measurement
Published online on February 10, 2026
Abstract
Applied Psychological Measurement, Volume 50, Issue 6, Page 255-276, September 2026.
We present a fast, score-based test to detecting model misspecification in item response theory (IRT) models that remains valid when person parameters are treated as fixed effects, as may be used for very large data sets. The new approximation (i) ...
We present a fast, score-based test to detecting model misspecification in item response theory (IRT) models that remains valid when person parameters are treated as fixed effects, as may be used for very large data sets. The new approximation (i) ...